Experiments have already been done in this field, but only on a small scale.
该领域的实验已在进行，但是仅是小规模地进行。
At present, the products have been listed on a small scale.
目前该产品已小规模上市。
Experiments have already been done in this case but only on a small scale.
实验已做了在这种情况下，只是小规模的。
Experiments have already been done in this case but only on a small scale.
实验已做了在这种情况下，只是小规模的。
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